{"id":"CVE-2023-42818","aliases":["EUVD-2023-47240","GHSA-jv3c-27cv-w8jv","GO-2025-3570","openSUSE-SU-2025:15225-1"],"status":"published","title":"SSH public key login without private key challenge if mfa is enabled in jumpserver","description":"JumpServer is an open source bastion host. When users enable MFA and use a public key for authentication, the Koko SSH server does not verify the corresponding SSH private key. An attacker could exploit a vulnerability by utilizing a disclosed public key to attempt brute-force authentication against the SSH service This issue has been patched in versions 3.6.5 and 3.5.6. Users are advised to upgrade. There are no known workarounds for this issue.","severity":{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00675,"percentile":0.52502,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-287","CWE-307"],"published":"2023-09-27T20:28:30Z","modified":"2026-10-28T02:30:38Z","fixes":[{"ecosystem":"Go","package":"github.com/jumpserver/jumpserver","fixed_in":["3.5.6+incompatible","3.6.5+incompatible"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Go","package":"github.com/jumpserver/koko","ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/jumpserver/jumpserver","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.5.6+incompatible"},{"introduced":"3.6.0+incompatible"},{"fixed":"3.6.5+incompatible"}]}]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"govulncheck-vulndb","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.20250612T141001-1.1"}]}],"bundled":29}],"products":[{"vendor":"fit2cloud","product":"jumpserver"},{"vendor":"jumpserver","product":"jumpserver"}],"references":[{"url":"https://github.com/jumpserver/jumpserver/security/advisories/GHSA-jv3c-27cv-w8jv","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Vendor Advisory","advisory","web"]},{"url":"https://www.sonarsource.com/blog/diving-into-jumpserver-attackers-gateway-to-internal-networks-1-2","tags":["x_refsource_MISC","article","web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/42xxx/CVE-2023-42818.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-42818","tags":["advisory"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2020-36846","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2022-31022","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2023-42818","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-0913","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-1792","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-22874","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-25207","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-25208","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-2571","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-29785","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-3230","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-3260","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-3454","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-3611","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-3913","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-4128","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-4573","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-4673","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-47950","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-48494","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-48495","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-48710","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-48865","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-48938","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-48948","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-48949","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-49011","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-49136","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-49140","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2023-42818","title":"SSH public key login without private key challenge if mfa is enabled in jumpserver","description":"JumpServer is an open source bastion host. When users enable MFA and use a public key for authentication, the Koko SSH server does not verify the corresponding SSH private key. An attacker could exploit a vulnerability by utilizing a disclosed public key to attempt brute-force authentication against the SSH service This issue has been patched in versions 3.6.5 and 3.5.6. Users are advised to upgrade. There are no known workarounds for this issue.","status":"published","published":"2023-09-27T20:28:30.507Z","modified":"2025-03-25T19:28:32.56Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:35:18.16233Z"}],"euvd":[{"id":"EUVD-2023-47240","description":"JumpServer is an open source bastion host. When users enable MFA and use a public key for authentication, the Koko SSH server does not verify the corresponding SSH private key. An attacker could exploit a vulnerability by utilizing a disclosed public key to attempt brute-force authentication against the SSH service This issue has been patched in versions 3.6.5 and 3.5.6. Users are advised to upgrade. There are no known workarounds for this issue.","status":"published","published":"2023-09-27T20:28:30Z","modified":"2025-03-25T19:28:32Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L","level":"medium"}],"updated_at":"2026-11-02T20:52:52.192094Z"}],"nvd":[{"id":"CVE-2023-42818","description":"JumpServer is an open source bastion host. When users enable MFA and use a public key for authentication, the Koko SSH server does not verify the corresponding SSH private key. An attacker could exploit a vulnerability by utilizing a disclosed public key to attempt brute-force authentication against the SSH service This issue has been patched in versions 3.6.5 and 3.5.6. Users are advised to upgrade. There are no known workarounds for this issue.","status":"published","published":"2023-09-27T21:15:10.173Z","modified":"2026-06-17T06:24:35.167Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L","level":"medium","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"}],"cwes":["CWE-287","CWE-307"],"updated_at":"2026-11-02T14:08:31.699785Z"}],"osv":[{"id":"CVE-2023-42818","title":"SSH public key login without private key challenge if mfa is enabled in jumpserver","description":"JumpServer is an open source bastion host. When users enable MFA and use a public key for authentication, the Koko SSH server does not verify the corresponding SSH private key. An attacker could exploit a vulnerability by utilizing a disclosed public key to attempt brute-force authentication against the SSH service This issue has been patched in versions 3.6.5 and 3.5.6. Users are advised to upgrade. There are no known workarounds for this issue.","status":"published","published":"2023-09-27T20:28:30.507Z","modified":"2026-10-28T02:30:38.396385469Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L","level":"medium"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T15:44:33.792101Z"},{"id":"GO-2025-3570","title":"SSH public key login without private key challenge if mfa is enabled in jumpserver in github.com/jumpserver/koko in github.com/jumpserver/jumpserver","description":"SSH public key login without private key challenge if mfa is enabled in jumpserver in github.com/jumpserver/koko in github.com/jumpserver/jumpserver","status":"published","published":"2025-06-12T14:09:53Z","modified":"2026-03-03T04:56:27.877919Z","updated_at":"2026-11-02T15:47:01.728182Z"},{"id":"openSUSE-SU-2025:15225-1","title":"govulncheck-vulndb-0.0.20250612T141001-1.1 on GA media","description":"These are all security issues fixed in the govulncheck-vulndb-0.0.20250612T141001-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2025-07-03T00:00:00Z","modified":"2026-03-23T04:53:30.823164Z","updated_at":"2026-11-02T16:58:37.399567Z"}]}}